/*
 * jQuery timepicker addon
 * By: Trent Richardson [http://trentrichardson.com]
 * Version 1.2
 * Last Modified: 02/02/2013
 *
 * Copyright 2013 Trent Richardson
 * You may use this project under MIT or GPL licenses.
 * http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
 * http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
 */

/*jslint evil: true, white: false, undef: false, nomen: false */
define(["jquery","jQuery.ui"], function(jQuery) {
    (function($) {

        /*
         * Lets not redefine timepicker, Prevent "Uncaught RangeError: Maximum call stack size exceeded"
         */
        $.ui.timepicker = $.ui.timepicker || {};
        if ($.ui.timepicker.version) {
            return;
        }

        /*
         * Extend jQueryUI, get it started with our version number
         */
        $.extend($.ui, {
            timepicker: {
                version: "1.2"
            }
        });

        /* 
         * Timepicker manager.
         * Use the singleton instance of this class, $.timepicker, to interact with the time picker.
         * Settings for (groups of) time pickers are maintained in an instance object,
         * allowing multiple different settings on the same page.
         */
        var Timepicker = function() {
            this.regional = []; // Available regional settings, indexed by language code
            this.regional[''] = {// Default regional settings
                currentText: 'Now',
                closeText: 'Done',
                amNames: ['AM', 'A'],
                pmNames: ['PM', 'P'],
                timeFormat: 'HH:mm',
                timeSuffix: '',
                timeOnlyTitle: 'Choose Time',
                timeText: 'Time',
                hourText: 'Hour',
                minuteText: 'Minute',
                secondText: 'Second',
                millisecText: 'Millisecond',
                timezoneText: 'Time Zone',
                isRTL: false
            };
            this._defaults = {// Global defaults for all the datetime picker instances
                showButtonPanel: true,
                timeOnly: false,
                showHour: true,
                showMinute: true,
                showSecond: false,
                showMillisec: false,
                showTimezone: false,
                showTime: true,
                stepHour: 1,
                stepMinute: 1,
                stepSecond: 1,
                stepMillisec: 1,
                hour: 0,
                minute: 0,
                second: 0,
                millisec: 0,
                timezone: null,
                useLocalTimezone: false,
                defaultTimezone: "+0000",
                hourMin: 0,
                minuteMin: 0,
                secondMin: 0,
                millisecMin: 0,
                hourMax: 23,
                minuteMax: 59,
                secondMax: 59,
                millisecMax: 999,
                minDateTime: null,
                maxDateTime: null,
                onSelect: null,
                hourGrid: 0,
                minuteGrid: 0,
                secondGrid: 0,
                millisecGrid: 0,
                alwaysSetTime: true,
                separator: ' ',
                altFieldTimeOnly: true,
                altTimeFormat: null,
                altSeparator: null,
                altTimeSuffix: null,
                pickerTimeFormat: null,
                pickerTimeSuffix: null,
                showTimepicker: true,
                timezoneIso8601: false,
                timezoneList: null,
                addSliderAccess: false,
                sliderAccessArgs: null,
                controlType: 'slider',
                defaultValue: null,
                parse: 'strict'
            };
            $.extend(this._defaults, this.regional['']);
        };

        $.extend(Timepicker.prototype, {
            $input: null,
            $altInput: null,
            $timeObj: null,
            inst: null,
            hour_slider: null,
            minute_slider: null,
            second_slider: null,
            millisec_slider: null,
            timezone_select: null,
            hour: 0,
            minute: 0,
            second: 0,
            millisec: 0,
            timezone: null,
            defaultTimezone: "+0000",
            hourMinOriginal: null,
            minuteMinOriginal: null,
            secondMinOriginal: null,
            millisecMinOriginal: null,
            hourMaxOriginal: null,
            minuteMaxOriginal: null,
            secondMaxOriginal: null,
            millisecMaxOriginal: null,
            ampm: '',
            formattedDate: '',
            formattedTime: '',
            formattedDateTime: '',
            timezoneList: null,
            units: ['hour', 'minute', 'second', 'millisec'],
            control: null,
            /* 
             * Override the default settings for all instances of the time picker.
             * @param  settings  object - the new settings to use as defaults (anonymous object)
             * @return the manager object
             */
            setDefaults: function(settings) {
                extendRemove(this._defaults, settings || {});
                return this;
            },
            /*
             * Create a new Timepicker instance
             */
            _newInst: function($input, o) {
                var tp_inst = new Timepicker(),
                        inlineSettings = {},
                        fns = {},
                        overrides, i;

                for (var attrName in this._defaults) {
                    if (this._defaults.hasOwnProperty(attrName)) {
                        var attrValue = $input.attr('time:' + attrName);
                        if (attrValue) {
                            try {
                                inlineSettings[attrName] = eval(attrValue);
                            } catch (err) {
                                inlineSettings[attrName] = attrValue;
                            }
                        }
                    }
                }
                overrides = {
                    beforeShow: function(input, dp_inst) {
                        if ($.isFunction(tp_inst._defaults.evnts.beforeShow)) {
                            return tp_inst._defaults.evnts.beforeShow.call($input[0], input, dp_inst, tp_inst);
                        }
                    },
                    onChangeMonthYear: function(year, month, dp_inst) {
                        // Update the time as well : this prevents the time from disappearing from the $input field.
                        tp_inst._updateDateTime(dp_inst);
                        if ($.isFunction(tp_inst._defaults.evnts.onChangeMonthYear)) {
                            tp_inst._defaults.evnts.onChangeMonthYear.call($input[0], year, month, dp_inst, tp_inst);
                        }
                    },
                    onClose: function(dateText, dp_inst) {
                        if (tp_inst.timeDefined === true && $input.val() !== '') {
                            tp_inst._updateDateTime(dp_inst);
                        }
                        if ($.isFunction(tp_inst._defaults.evnts.onClose)) {
                            tp_inst._defaults.evnts.onClose.call($input[0], dateText, dp_inst, tp_inst);
                        }
                    }
                };
                for (i in overrides) {
                    if (overrides.hasOwnProperty(i)) {
                        fns[i] = o[i] || null;
                    }
                }
                tp_inst._defaults = $.extend({}, this._defaults, inlineSettings, o, overrides, {
                    evnts: fns,
                    timepicker: tp_inst // add timepicker as a property of datepicker: $.datepicker._get(dp_inst, 'timepicker');
                });
                tp_inst.amNames = $.map(tp_inst._defaults.amNames, function(val) {
                    return val.toUpperCase();
                });
                tp_inst.pmNames = $.map(tp_inst._defaults.pmNames, function(val) {
                    return val.toUpperCase();
                });

                // controlType is string - key to our this._controls
                if (typeof(tp_inst._defaults.controlType) === 'string') {
                    if ($.fn[tp_inst._defaults.controlType] === undefined) {
                        tp_inst._defaults.controlType = 'select';
                    }
                    tp_inst.control = tp_inst._controls[tp_inst._defaults.controlType];
                }
                // controlType is an object and must implement create, options, value methods
                else {
                    tp_inst.control = tp_inst._defaults.controlType;
                }

                if (tp_inst._defaults.timezoneList === null) {
                    var timezoneList = ['-1200', '-1100', '-1000', '-0930', '-0900', '-0800', '-0700', '-0600', '-0500', '-0430', '-0400', '-0330', '-0300', '-0200', '-0100', '+0000',
                        '+0100', '+0200', '+0300', '+0330', '+0400', '+0430', '+0500', '+0530', '+0545', '+0600', '+0630', '+0700', '+0800', '+0845', '+0900', '+0930',
                        '+1000', '+1030', '+1100', '+1130', '+1200', '+1245', '+1300', '+1400'];

                    if (tp_inst._defaults.timezoneIso8601) {
                        timezoneList = $.map(timezoneList, function(val) {
                            return val == '+0000' ? 'Z' : (val.substring(0, 3) + ':' + val.substring(3));
                        });
                    }
                    tp_inst._defaults.timezoneList = timezoneList;
                }

                tp_inst.timezone = tp_inst._defaults.timezone;
                tp_inst.hour = tp_inst._defaults.hour < tp_inst._defaults.hourMin ? tp_inst._defaults.hourMin :
                        tp_inst._defaults.hour > tp_inst._defaults.hourMax ? tp_inst._defaults.hourMax : tp_inst._defaults.hour;
                tp_inst.minute = tp_inst._defaults.minute < tp_inst._defaults.minuteMin ? tp_inst._defaults.minuteMin :
                        tp_inst._defaults.minute > tp_inst._defaults.minuteMax ? tp_inst._defaults.minuteMax : tp_inst._defaults.minute;
                tp_inst.second = tp_inst._defaults.second < tp_inst._defaults.secondMin ? tp_inst._defaults.secondMin :
                        tp_inst._defaults.second > tp_inst._defaults.secondMax ? tp_inst._defaults.secondMax : tp_inst._defaults.second;
                tp_inst.millisec = tp_inst._defaults.millisec < tp_inst._defaults.millisecMin ? tp_inst._defaults.millisecMin :
                        tp_inst._defaults.millisec > tp_inst._defaults.millisecMax ? tp_inst._defaults.millisecMax : tp_inst._defaults.millisec;
                tp_inst.ampm = '';
                tp_inst.$input = $input;

                if (o.altField) {
                    tp_inst.$altInput = $(o.altField).css({
                        cursor: 'pointer'
                    }).focus(function() {
                        $input.trigger("focus");
                    });
                }

                if (tp_inst._defaults.minDate === 0 || tp_inst._defaults.minDateTime === 0) {
                    tp_inst._defaults.minDate = new Date();
                }
                if (tp_inst._defaults.maxDate === 0 || tp_inst._defaults.maxDateTime === 0) {
                    tp_inst._defaults.maxDate = new Date();
                }

                // datepicker needs minDate/maxDate, timepicker needs minDateTime/maxDateTime..
                if (tp_inst._defaults.minDate !== undefined && tp_inst._defaults.minDate instanceof Date) {
                    tp_inst._defaults.minDateTime = new Date(tp_inst._defaults.minDate.getTime());
                }
                if (tp_inst._defaults.minDateTime !== undefined && tp_inst._defaults.minDateTime instanceof Date) {
                    tp_inst._defaults.minDate = new Date(tp_inst._defaults.minDateTime.getTime());
                }
                if (tp_inst._defaults.maxDate !== undefined && tp_inst._defaults.maxDate instanceof Date) {
                    tp_inst._defaults.maxDateTime = new Date(tp_inst._defaults.maxDate.getTime());
                }
                if (tp_inst._defaults.maxDateTime !== undefined && tp_inst._defaults.maxDateTime instanceof Date) {
                    tp_inst._defaults.maxDate = new Date(tp_inst._defaults.maxDateTime.getTime());
                }
                tp_inst.$input.bind('focus', function() {
                    tp_inst._onFocus();
                });

                return tp_inst;
            },
            /*
             * add our sliders to the calendar
             */
            _addTimePicker: function(dp_inst) {
                var currDT = (this.$altInput && this._defaults.altFieldTimeOnly) ? this.$input.val() + ' ' + this.$altInput.val() : this.$input.val();

                this.timeDefined = this._parseTime(currDT);
                this._limitMinMaxDateTime(dp_inst, false);
                this._injectTimePicker();
            },
            /*
             * parse the time string from input value or _setTime
             */
            _parseTime: function(timeString, withDate) {
                if (!this.inst) {
                    this.inst = $.datepicker._getInst(this.$input[0]);
                }

                if (withDate || !this._defaults.timeOnly) {
                    var dp_dateFormat = $.datepicker._get(this.inst, 'dateFormat');
                    try {
                        var parseRes = parseDateTimeInternal(dp_dateFormat, this._defaults.timeFormat, timeString, $.datepicker._getFormatConfig(this.inst), this._defaults);
                        if (!parseRes.timeObj) {
                            return false;
                        }
                        $.extend(this, parseRes.timeObj);
                    } catch (err) {
                        $.timepicker.log("Error parsing the date/time string: " + err +
                                "\ndate/time string = " + timeString +
                                "\ntimeFormat = " + this._defaults.timeFormat +
                                "\ndateFormat = " + dp_dateFormat);
                        return false;
                    }
                    return true;
                } else {
                    var timeObj = $.datepicker.parseTime(this._defaults.timeFormat, timeString, this._defaults);
                    if (!timeObj) {
                        return false;
                    }
                    $.extend(this, timeObj);
                    return true;
                }
            },
            /*
             * generate and inject html for timepicker into ui datepicker
             */
            _injectTimePicker: function() {
                var $dp = this.inst.dpDiv,
                        o = this.inst.settings,
                        tp_inst = this,
                        litem = '',
                        uitem = '',
                        max = {},
                        gridSize = {},
                        size = null;

                // Prevent displaying twice
                if ($dp.find("div.ui-timepicker-div").length === 0 && o.showTimepicker) {
                    var noDisplay = ' style="display:none;"',
                            html = '<div class="ui-timepicker-div' + (o.isRTL ? ' ui-timepicker-rtl' : '') + '"><dl>' + '<dt class="ui_tpicker_time_label"' + ((o.showTime) ? '' : noDisplay) + '>' + o.timeText + '</dt>' +
                            '<dd class="ui_tpicker_time"' + ((o.showTime) ? '' : noDisplay) + '></dd>';

                    // Create the markup
                    for (var i = 0, l = this.units.length; i < l; i++) {
                        litem = this.units[i];
                        uitem = litem.substr(0, 1).toUpperCase() + litem.substr(1);
                        // Added by Peter Medeiros:
                        // - Figure out what the hour/minute/second max should be based on the step values.
                        // - Example: if stepMinute is 15, then minMax is 45.
                        max[litem] = parseInt((o[litem + 'Max'] - ((o[litem + 'Max'] - o[litem + 'Min']) % o['step' + uitem])), 10);
                        gridSize[litem] = 0;

                        html += '<dt class="ui_tpicker_' + litem + '_label"' + ((o['show' + uitem]) ? '' : noDisplay) + '>' + o[litem + 'Text'] + '</dt>' +
                                '<dd class="ui_tpicker_' + litem + '"><div class="ui_tpicker_' + litem + '_slider"' + ((o['show' + uitem]) ? '' : noDisplay) + '></div>';

                        if (o['show' + uitem] && o[litem + 'Grid'] > 0) {
                            html += '<div style="padding-left: 1px"><table class="ui-tpicker-grid-label"><tr>';

                            if (litem == 'hour') {
                                for (var h = o[litem + 'Min']; h <= max[litem]; h += parseInt(o[litem + 'Grid'], 10)) {
                                    gridSize[litem]++;
                                    var tmph = $.datepicker.formatTime(useAmpm(o.pickerTimeFormat || o.timeFormat) ? 'hht' : 'HH', {hour: h}, o);
                                    html += '<td data-for="' + litem + '">' + tmph + '</td>';
                                }
                            }
                            else {
                                for (var m = o[litem + 'Min']; m <= max[litem]; m += parseInt(o[litem + 'Grid'], 10)) {
                                    gridSize[litem]++;
                                    html += '<td data-for="' + litem + '">' + ((m < 10) ? '0' : '') + m + '</td>';
                                }
                            }

                            html += '</tr></table></div>';
                        }
                        html += '</dd>';
                    }

                    // Timezone
                    html += '<dt class="ui_tpicker_timezone_label"' + ((o.showTimezone) ? '' : noDisplay) + '>' + o.timezoneText + '</dt>';
                    html += '<dd class="ui_tpicker_timezone" ' + ((o.showTimezone) ? '' : noDisplay) + '></dd>';

                    // Create the elements from string
                    html += '</dl></div>';
                    var $tp = $(html);

                    // if we only want time picker...
                    if (o.timeOnly === true) {
                        $tp.prepend('<div class="ui-widget-header ui-helper-clearfix ui-corner-all">' + '<div class="ui-datepicker-title">' + o.timeOnlyTitle + '</div>' + '</div>');
                        $dp.find('.ui-datepicker-header, .ui-datepicker-calendar').hide();
                    }

                    // add sliders, adjust grids, add events
                    for (var i = 0, l = tp_inst.units.length; i < l; i++) {
                        litem = tp_inst.units[i];
                        uitem = litem.substr(0, 1).toUpperCase() + litem.substr(1);

                        // add the slider
                        tp_inst[litem + '_slider'] = tp_inst.control.create(tp_inst, $tp.find('.ui_tpicker_' + litem + '_slider'), litem, tp_inst[litem], o[litem + 'Min'], max[litem], o['step' + uitem]);

                        // adjust the grid and add click event
                        if (o['show' + uitem] && o[litem + 'Grid'] > 0) {
                            size = 100 * gridSize[litem] * o[litem + 'Grid'] / (max[litem] - o[litem + 'Min']);
                            $tp.find('.ui_tpicker_' + litem + ' table').css({
                                width: size + "%",
                                marginLeft: o.isRTL ? '0' : ((size / (-2 * gridSize[litem])) + "%"),
                                marginRight: o.isRTL ? ((size / (-2 * gridSize[litem])) + "%") : '0',
                                borderCollapse: 'collapse'
                            }).find("td").click(function(e) {
                                var $t = $(this),
                                        h = $t.html(),
                                        n = parseInt(h.replace(/[^0-9]/g), 10),
                                        ap = h.replace(/[^apm]/ig),
                                        f = $t.data('for'); // loses scope, so we use data-for

                                if (f == 'hour') {
                                    if (ap.indexOf('p') !== -1 && n < 12) {
                                        n += 12;
                                    }
                                    else {
                                        if (ap.indexOf('a') !== -1 && n === 12) {
                                            n = 0;
                                        }
                                    }
                                }

                                tp_inst.control.value(tp_inst, tp_inst[f + '_slider'], litem, n);

                                tp_inst._onTimeChange();
                                tp_inst._onSelectHandler();
                            })
                                    .css({
                                cursor: 'pointer',
                                width: (100 / gridSize[litem]) + '%',
                                textAlign: 'center',
                                overflow: 'hidden'
                            });
                        } // end if grid > 0
                    } // end for loop

                    // Add timezone options
                    this.timezone_select = $tp.find('.ui_tpicker_timezone').append('<select></select>').find("select");
                    $.fn.append.apply(this.timezone_select,
                            $.map(o.timezoneList, function(val, idx) {
                        return $("<option />").val(typeof val == "object" ? val.value : val).text(typeof val == "object" ? val.label : val);
                    }));
                    if (typeof(this.timezone) != "undefined" && this.timezone !== null && this.timezone !== "") {
                        var local_date = new Date(this.inst.selectedYear, this.inst.selectedMonth, this.inst.selectedDay, 12);
                        var local_timezone = $.timepicker.timeZoneOffsetString(local_date);
                        if (local_timezone == this.timezone) {
                            selectLocalTimeZone(tp_inst);
                        } else {
                            this.timezone_select.val(this.timezone);
                        }
                    } else {
                        if (typeof(this.hour) != "undefined" && this.hour !== null && this.hour !== "") {
                            this.timezone_select.val(o.defaultTimezone);
                        } else {
                            selectLocalTimeZone(tp_inst);
                        }
                    }
                    this.timezone_select.change(function() {
                        tp_inst._defaults.useLocalTimezone = false;
                        tp_inst._onTimeChange();
                        tp_inst._onSelectHandler();
                    });
                    // End timezone options

                    // inject timepicker into datepicker
                    var $buttonPanel = $dp.find('.ui-datepicker-buttonpane');
                    if ($buttonPanel.length) {
                        $buttonPanel.before($tp);
                    } else {
                        $dp.append($tp);
                    }

                    this.$timeObj = $tp.find('.ui_tpicker_time');

                    if (this.inst !== null) {
                        var timeDefined = this.timeDefined;
                        this._onTimeChange();
                        this.timeDefined = timeDefined;
                    }

                    // slideAccess integration: http://trentrichardson.com/2011/11/11/jquery-ui-sliders-and-touch-accessibility/
                    if (this._defaults.addSliderAccess) {
                        var sliderAccessArgs = this._defaults.sliderAccessArgs,
                                rtl = this._defaults.isRTL;
                        sliderAccessArgs.isRTL = rtl;

                        setTimeout(function() { // fix for inline mode
                            if ($tp.find('.ui-slider-access').length === 0) {
                                $tp.find('.ui-slider:visible').sliderAccess(sliderAccessArgs);

                                // fix any grids since sliders are shorter
                                var sliderAccessWidth = $tp.find('.ui-slider-access:eq(0)').outerWidth(true);
                                if (sliderAccessWidth) {
                                    $tp.find('table:visible').each(function() {
                                        var $g = $(this),
                                                oldWidth = $g.outerWidth(),
                                                oldMarginLeft = $g.css(rtl ? 'marginRight' : 'marginLeft').toString().replace('%', ''),
                                                newWidth = oldWidth - sliderAccessWidth,
                                                newMarginLeft = ((oldMarginLeft * newWidth) / oldWidth) + '%',
                                                css = {width: newWidth, marginRight: 0, marginLeft: 0};
                                        css[rtl ? 'marginRight' : 'marginLeft'] = newMarginLeft;
                                        $g.css(css);
                                    });
                                }
                            }
                        }, 10);
                    }
                    // end slideAccess integration

                }
            },
            /*
             * This function tries to limit the ability to go outside the
             * min/max date range
             */
            _limitMinMaxDateTime: function(dp_inst, adjustSliders) {
                var o = this._defaults,
                        dp_date = new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay);

                if (!this._defaults.showTimepicker) {
                    return;
                } // No time so nothing to check here

                if ($.datepicker._get(dp_inst, 'minDateTime') !== null && $.datepicker._get(dp_inst, 'minDateTime') !== undefined && dp_date) {
                    var minDateTime = $.datepicker._get(dp_inst, 'minDateTime'),
                            minDateTimeDate = new Date(minDateTime.getFullYear(), minDateTime.getMonth(), minDateTime.getDate(), 0, 0, 0, 0);

                    if (this.hourMinOriginal === null || this.minuteMinOriginal === null || this.secondMinOriginal === null || this.millisecMinOriginal === null) {
                        this.hourMinOriginal = o.hourMin;
                        this.minuteMinOriginal = o.minuteMin;
                        this.secondMinOriginal = o.secondMin;
                        this.millisecMinOriginal = o.millisecMin;
                    }

                    if (dp_inst.settings.timeOnly || minDateTimeDate.getTime() == dp_date.getTime()) {
                        this._defaults.hourMin = minDateTime.getHours();
                        if (this.hour <= this._defaults.hourMin) {
                            this.hour = this._defaults.hourMin;
                            this._defaults.minuteMin = minDateTime.getMinutes();
                            if (this.minute <= this._defaults.minuteMin) {
                                this.minute = this._defaults.minuteMin;
                                this._defaults.secondMin = minDateTime.getSeconds();
                                if (this.second <= this._defaults.secondMin) {
                                    this.second = this._defaults.secondMin;
                                    this._defaults.millisecMin = minDateTime.getMilliseconds();
                                } else {
                                    if (this.millisec < this._defaults.millisecMin) {
                                        this.millisec = this._defaults.millisecMin;
                                    }
                                    this._defaults.millisecMin = this.millisecMinOriginal;
                                }
                            } else {
                                this._defaults.secondMin = this.secondMinOriginal;
                                this._defaults.millisecMin = this.millisecMinOriginal;
                            }
                        } else {
                            this._defaults.minuteMin = this.minuteMinOriginal;
                            this._defaults.secondMin = this.secondMinOriginal;
                            this._defaults.millisecMin = this.millisecMinOriginal;
                        }
                    } else {
                        this._defaults.hourMin = this.hourMinOriginal;
                        this._defaults.minuteMin = this.minuteMinOriginal;
                        this._defaults.secondMin = this.secondMinOriginal;
                        this._defaults.millisecMin = this.millisecMinOriginal;
                    }
                }

                if ($.datepicker._get(dp_inst, 'maxDateTime') !== null && $.datepicker._get(dp_inst, 'maxDateTime') !== undefined && dp_date) {
                    var maxDateTime = $.datepicker._get(dp_inst, 'maxDateTime'),
                            maxDateTimeDate = new Date(maxDateTime.getFullYear(), maxDateTime.getMonth(), maxDateTime.getDate(), 0, 0, 0, 0);

                    if (this.hourMaxOriginal === null || this.minuteMaxOriginal === null || this.secondMaxOriginal === null) {
                        this.hourMaxOriginal = o.hourMax;
                        this.minuteMaxOriginal = o.minuteMax;
                        this.secondMaxOriginal = o.secondMax;
                        this.millisecMaxOriginal = o.millisecMax;
                    }

                    if (dp_inst.settings.timeOnly || maxDateTimeDate.getTime() == dp_date.getTime()) {
                        this._defaults.hourMax = maxDateTime.getHours();
                        if (this.hour >= this._defaults.hourMax) {
                            this.hour = this._defaults.hourMax;
                            this._defaults.minuteMax = maxDateTime.getMinutes();
                            if (this.minute >= this._defaults.minuteMax) {
                                this.minute = this._defaults.minuteMax;
                                this._defaults.secondMax = maxDateTime.getSeconds();
                                if (this.second >= this._defaults.secondMax) {
                                    this.second = this._defaults.secondMax;
                                    this._defaults.millisecMax = maxDateTime.getMilliseconds();
                                } else {
                                    if (this.millisec > this._defaults.millisecMax) {
                                        this.millisec = this._defaults.millisecMax;
                                    }
                                    this._defaults.millisecMax = this.millisecMaxOriginal;
                                }
                            } else {
                                this._defaults.secondMax = this.secondMaxOriginal;
                                this._defaults.millisecMax = this.millisecMaxOriginal;
                            }
                        } else {
                            this._defaults.minuteMax = this.minuteMaxOriginal;
                            this._defaults.secondMax = this.secondMaxOriginal;
                            this._defaults.millisecMax = this.millisecMaxOriginal;
                        }
                    } else {
                        this._defaults.hourMax = this.hourMaxOriginal;
                        this._defaults.minuteMax = this.minuteMaxOriginal;
                        this._defaults.secondMax = this.secondMaxOriginal;
                        this._defaults.millisecMax = this.millisecMaxOriginal;
                    }
                }

                if (adjustSliders !== undefined && adjustSliders === true) {
                    var hourMax = parseInt((this._defaults.hourMax - ((this._defaults.hourMax - this._defaults.hourMin) % this._defaults.stepHour)), 10),
                            minMax = parseInt((this._defaults.minuteMax - ((this._defaults.minuteMax - this._defaults.minuteMin) % this._defaults.stepMinute)), 10),
                            secMax = parseInt((this._defaults.secondMax - ((this._defaults.secondMax - this._defaults.secondMin) % this._defaults.stepSecond)), 10),
                            millisecMax = parseInt((this._defaults.millisecMax - ((this._defaults.millisecMax - this._defaults.millisecMin) % this._defaults.stepMillisec)), 10);

                    if (this.hour_slider) {
                        this.control.options(this, this.hour_slider, 'hour', {min: this._defaults.hourMin, max: hourMax});
                        this.control.value(this, this.hour_slider, 'hour', this.hour - (this.hour % this._defaults.stepHour));
                    }
                    if (this.minute_slider) {
                        this.control.options(this, this.minute_slider, 'minute', {min: this._defaults.minuteMin, max: minMax});
                        this.control.value(this, this.minute_slider, 'minute', this.minute - (this.minute % this._defaults.stepMinute));
                    }
                    if (this.second_slider) {
                        this.control.options(this, this.second_slider, 'second', {min: this._defaults.secondMin, max: secMax});
                        this.control.value(this, this.second_slider, 'second', this.second - (this.second % this._defaults.stepSecond));
                    }
                    if (this.millisec_slider) {
                        this.control.options(this, this.millisec_slider, 'millisec', {min: this._defaults.millisecMin, max: millisecMax});
                        this.control.value(this, this.millisec_slider, 'millisec', this.millisec - (this.millisec % this._defaults.stepMillisec));
                    }
                }

            },
            /*
             * when a slider moves, set the internal time...
             * on time change is also called when the time is updated in the text field
             */
            _onTimeChange: function() {
                var hour = (this.hour_slider) ? this.control.value(this, this.hour_slider, 'hour') : false,
                        minute = (this.minute_slider) ? this.control.value(this, this.minute_slider, 'minute') : false,
                        second = (this.second_slider) ? this.control.value(this, this.second_slider, 'second') : false,
                        millisec = (this.millisec_slider) ? this.control.value(this, this.millisec_slider, 'millisec') : false,
                        timezone = (this.timezone_select) ? this.timezone_select.val() : false,
                        o = this._defaults,
                        pickerTimeFormat = o.pickerTimeFormat || o.timeFormat,
                        pickerTimeSuffix = o.pickerTimeSuffix || o.timeSuffix;

                if (typeof(hour) == 'object') {
                    hour = false;
                }
                if (typeof(minute) == 'object') {
                    minute = false;
                }
                if (typeof(second) == 'object') {
                    second = false;
                }
                if (typeof(millisec) == 'object') {
                    millisec = false;
                }
                if (typeof(timezone) == 'object') {
                    timezone = false;
                }

                if (hour !== false) {
                    hour = parseInt(hour, 10);
                }
                if (minute !== false) {
                    minute = parseInt(minute, 10);
                }
                if (second !== false) {
                    second = parseInt(second, 10);
                }
                if (millisec !== false) {
                    millisec = parseInt(millisec, 10);
                }

                var ampm = o[hour < 12 ? 'amNames' : 'pmNames'][0];

                // If the update was done in the input field, the input field should not be updated.
                // If the update was done using the sliders, update the input field.
                var hasChanged = (hour != this.hour || minute != this.minute || second != this.second || millisec != this.millisec
                        || (this.ampm.length > 0 && (hour < 12) != ($.inArray(this.ampm.toUpperCase(), this.amNames) !== -1))
                        || ((this.timezone === null && timezone != this.defaultTimezone) || (this.timezone !== null && timezone != this.timezone)));

                if (hasChanged) {

                    if (hour !== false) {
                        this.hour = hour;
                    }
                    if (minute !== false) {
                        this.minute = minute;
                    }
                    if (second !== false) {
                        this.second = second;
                    }
                    if (millisec !== false) {
                        this.millisec = millisec;
                    }
                    if (timezone !== false) {
                        this.timezone = timezone;
                    }

                    if (!this.inst) {
                        this.inst = $.datepicker._getInst(this.$input[0]);
                    }

                    this._limitMinMaxDateTime(this.inst, true);
                }
                if (useAmpm(o.timeFormat)) {
                    this.ampm = ampm;
                }

                // Updates the time within the timepicker
                this.formattedTime = $.datepicker.formatTime(o.timeFormat, this, o);
                if (this.$timeObj) {
                    if (pickerTimeFormat === o.timeFormat) {
                        this.$timeObj.text(this.formattedTime + pickerTimeSuffix);
                    }
                    else {
                        this.$timeObj.text($.datepicker.formatTime(pickerTimeFormat, this, o) + pickerTimeSuffix);
                    }
                }

                this.timeDefined = true;
                if (hasChanged) {
                    this._updateDateTime();
                }
            },
            /*
             * call custom onSelect.
             * bind to sliders slidestop, and grid click.
             */
            _onSelectHandler: function() {
                var onSelect = this._defaults.onSelect || this.inst.settings.onSelect;
                var inputEl = this.$input ? this.$input[0] : null;
                if (onSelect && inputEl) {
                    onSelect.apply(inputEl, [this.formattedDateTime, this]);
                }
            },
            /*
             * update our input with the new date time..
             */
            _updateDateTime: function(dp_inst) {
                dp_inst = this.inst || dp_inst;
                var dt = $.datepicker._daylightSavingAdjust(new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay)),
                        dateFmt = $.datepicker._get(dp_inst, 'dateFormat'),
                        formatCfg = $.datepicker._getFormatConfig(dp_inst),
                        timeAvailable = dt !== null && this.timeDefined;
                this.formattedDate = $.datepicker.formatDate(dateFmt, (dt === null ? new Date() : dt), formatCfg);
                var formattedDateTime = this.formattedDate;

                // if a slider was changed but datepicker doesn't have a value yet, set it
                if (dp_inst.lastVal == "") {
                    dp_inst.currentYear = dp_inst.selectedYear;
                    dp_inst.currentMonth = dp_inst.selectedMonth;
                    dp_inst.currentDay = dp_inst.selectedDay;
                }

                /*
                 * remove following lines to force every changes in date picker to change the input value
                 * Bug descriptions: when an input field has a default value, and click on the field to pop up the date picker. 
                 * If the user manually empty the value in the input field, the date picker will never change selected value.
                 */
                //if (dp_inst.lastVal !== undefined && (dp_inst.lastVal.length > 0 && this.$input.val().length === 0)) {
                //	return;
                //}

                if (this._defaults.timeOnly === true) {
                    formattedDateTime = this.formattedTime;
                } else if (this._defaults.timeOnly !== true && (this._defaults.alwaysSetTime || timeAvailable)) {
                    formattedDateTime += this._defaults.separator + this.formattedTime + this._defaults.timeSuffix;
                }

                this.formattedDateTime = formattedDateTime;

                if (!this._defaults.showTimepicker) {
                    this.$input.val(this.formattedDate);
                } else if (this.$altInput && this._defaults.altFieldTimeOnly === true) {
                    this.$altInput.val(this.formattedTime);
                    this.$input.val(this.formattedDate);
                } else if (this.$altInput) {
                    this.$input.val(formattedDateTime);
                    var altFormattedDateTime = '',
                            altSeparator = this._defaults.altSeparator ? this._defaults.altSeparator : this._defaults.separator,
                            altTimeSuffix = this._defaults.altTimeSuffix ? this._defaults.altTimeSuffix : this._defaults.timeSuffix;

                    if (this._defaults.altFormat)
                        altFormattedDateTime = $.datepicker.formatDate(this._defaults.altFormat, (dt === null ? new Date() : dt), formatCfg);
                    else
                        altFormattedDateTime = this.formattedDate;
                    if (altFormattedDateTime)
                        altFormattedDateTime += altSeparator;
                    if (this._defaults.altTimeFormat)
                        altFormattedDateTime += $.datepicker.formatTime(this._defaults.altTimeFormat, this, this._defaults) + altTimeSuffix;
                    else
                        altFormattedDateTime += this.formattedTime + altTimeSuffix;
                    this.$altInput.val(altFormattedDateTime);
                } else {
                    this.$input.val(formattedDateTime);
                }

                this.$input.trigger("change");
            },
            _onFocus: function() {
                if (!this.$input.val() && this._defaults.defaultValue) {
                    this.$input.val(this._defaults.defaultValue);
                    var inst = $.datepicker._getInst(this.$input.get(0)),
                            tp_inst = $.datepicker._get(inst, 'timepicker');
                    if (tp_inst) {
                        if (tp_inst._defaults.timeOnly && (inst.input.val() != inst.lastVal)) {
                            try {
                                $.datepicker._updateDatepicker(inst);
                            } catch (err) {
                                $.timepicker.log(err);
                            }
                        }
                    }
                }
            },
            /*
             * Small abstraction to control types
             * We can add more, just be sure to follow the pattern: create, options, value
             */
            _controls: {
                // slider methods
                slider: {
                    create: function(tp_inst, obj, unit, val, min, max, step) {
                        var rtl = tp_inst._defaults.isRTL; // if rtl go -60->0 instead of 0->60
                        return obj.prop('slide', null).slider({
                            orientation: "horizontal",
                            value: rtl ? val * -1 : val,
                            min: rtl ? max * -1 : min,
                            max: rtl ? min * -1 : max,
                            step: step,
                            slide: function(event, ui) {
                                tp_inst.control.value(tp_inst, $(this), unit, rtl ? ui.value * -1 : ui.value);
                                tp_inst._onTimeChange();
                            },
                            stop: function(event, ui) {
                                tp_inst._onSelectHandler();
                            }
                        });
                    },
                    options: function(tp_inst, obj, unit, opts, val) {
                        if (tp_inst._defaults.isRTL) {
                            if (typeof(opts) == 'string') {
                                if (opts == 'min' || opts == 'max') {
                                    if (val !== undefined)
                                        return obj.slider(opts, val * -1);
                                    return Math.abs(obj.slider(opts));
                                }
                                return obj.slider(opts);
                            }
                            var min = opts.min,
                                    max = opts.max;
                            opts.min = opts.max = null;
                            if (min !== undefined)
                                opts.max = min * -1;
                            if (max !== undefined)
                                opts.min = max * -1;
                            return obj.slider(opts);
                        }
                        if (typeof(opts) == 'string' && val !== undefined)
                            return obj.slider(opts, val);
                        return obj.slider(opts);
                    },
                    value: function(tp_inst, obj, unit, val) {
                        if (tp_inst._defaults.isRTL) {
                            if (val !== undefined)
                                return obj.slider('value', val * -1);
                            return Math.abs(obj.slider('value'));
                        }
                        if (val !== undefined)
                            return obj.slider('value', val);
                        return obj.slider('value');
                    }
                },
                // select methods
                select: {
                    create: function(tp_inst, obj, unit, val, min, max, step) {
                        var sel = '<select class="ui-timepicker-select" data-unit="' + unit + '" data-min="' + min + '" data-max="' + max + '" data-step="' + step + '">',
                                ul = tp_inst._defaults.timeFormat.indexOf('t') !== -1 ? 'toLowerCase' : 'toUpperCase',
                                m = 0;

                        for (var i = min; i <= max; i += step) {
                            sel += '<option value="' + i + '"' + (i == val ? ' selected' : '') + '>';
                            if (unit == 'hour' && useAmpm(tp_inst._defaults.pickerTimeFormat || tp_inst._defaults.timeFormat))
                                sel += $.datepicker.formatTime("hh TT", {hour: i}, tp_inst._defaults);
                            else if (unit == 'millisec' || i >= 10)
                                sel += i;
                            else
                                sel += '0' + i.toString();
                            sel += '</option>';
                        }
                        sel += '</select>';

                        obj.children('select').remove();

                        $(sel).appendTo(obj).change(function(e) {
                            tp_inst._onTimeChange();
                            tp_inst._onSelectHandler();
                        });

                        return obj;
                    },
                    options: function(tp_inst, obj, unit, opts, val) {
                        var o = {},
                                $t = obj.children('select');
                        if (typeof(opts) == 'string') {
                            if (val === undefined)
                                return $t.data(opts);
                            o[opts] = val;
                        }
                        else
                            o = opts;
                        return tp_inst.control.create(tp_inst, obj, $t.data('unit'), $t.val(), o.min || $t.data('min'), o.max || $t.data('max'), o.step || $t.data('step'));
                    },
                    value: function(tp_inst, obj, unit, val) {
                        var $t = obj.children('select');
                        if (val !== undefined)
                            return $t.val(val);
                        return $t.val();
                    }
                }
            } // end _controls

        });

        $.fn.extend({
            /*
             * shorthand just to use timepicker..
             */
            timepicker: function(o) {
                o = o || {};
                var tmp_args = Array.prototype.slice.call(arguments);

                if (typeof o == 'object') {
                    tmp_args[0] = $.extend(o, {
                        timeOnly: true
                    });
                }

                return $(this).each(function() {
                    $.fn.datetimepicker.apply($(this), tmp_args);
                });
            },
            /*
             * extend timepicker to datepicker
             */
            datetimepicker: function(o) {
                o = o || {};
                var tmp_args = arguments;

                if (typeof(o) == 'string') {
                    if (o == 'getDate') {
                        return $.fn.datepicker.apply($(this[0]), tmp_args);
                    } else {
                        return this.each(function() {
                            var $t = $(this);
                            $t.datepicker.apply($t, tmp_args);
                        });
                    }
                } else {
                    return this.each(function() {
                        var $t = $(this);
                        $t.datepicker($.timepicker._newInst($t, o)._defaults);
                    });
                }
            }
        });

        /*
         * Public Utility to parse date and time
         */
        $.datepicker.parseDateTime = function(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings) {
            var parseRes = parseDateTimeInternal(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings);
            if (parseRes.timeObj) {
                var t = parseRes.timeObj;
                parseRes.date.setHours(t.hour, t.minute, t.second, t.millisec);
            }

            return parseRes.date;
        };

        /*
         * Public utility to parse time
         */
        $.datepicker.parseTime = function(timeFormat, timeString, options) {
            var o = extendRemove(extendRemove({}, $.timepicker._defaults), options || {});

            // Strict parse requires the timeString to match the timeFormat exactly
            var strictParse = function(f, s, o) {

                // pattern for standard and localized AM/PM markers
                var getPatternAmpm = function(amNames, pmNames) {
                    var markers = [];
                    if (amNames) {
                        $.merge(markers, amNames);
                    }
                    if (pmNames) {
                        $.merge(markers, pmNames);
                    }
                    markers = $.map(markers, function(val) {
                        return val.replace(/[.*+?|()\[\]{}\\]/g, '\\$&');
                    });
                    return '(' + markers.join('|') + ')?';
                };

                // figure out position of time elements.. cause js cant do named captures
                var getFormatPositions = function(timeFormat) {
                    var finds = timeFormat.toLowerCase().match(/(h{1,2}|m{1,2}|s{1,2}|l{1}|t{1,2}|z|'.*?')/g),
                            orders = {
                        h: -1,
                        m: -1,
                        s: -1,
                        l: -1,
                        t: -1,
                        z: -1
                    };

                    if (finds) {
                        for (var i = 0; i < finds.length; i++) {
                            if (orders[finds[i].toString().charAt(0)] == -1) {
                                orders[finds[i].toString().charAt(0)] = i + 1;
                            }
                        }
                    }
                    return orders;
                };

                var regstr = '^' + f.toString()
                        .replace(/([hH]{1,2}|mm?|ss?|[tT]{1,2}|[lz]|'.*?')/g, function(match) {
                    var ml = match.length;
                    switch (match.charAt(0).toLowerCase()) {
                        case 'h':
                            return ml === 1 ? '(\\d?\\d)' : '(\\d{' + ml + '})';
                        case 'm':
                            return ml === 1 ? '(\\d?\\d)' : '(\\d{' + ml + '})';
                        case 's':
                            return ml === 1 ? '(\\d?\\d)' : '(\\d{' + ml + '})';
                        case 'l':
                            return '(\\d?\\d?\\d)';
                        case 'z':
                            return '(z|[-+]\\d\\d:?\\d\\d|\\S+)?';
                        case 't':
                            return getPatternAmpm(o.amNames, o.pmNames);
                        default:    // literal escaped in quotes
                            return '(' + match.replace(/\'/g, "").replace(/(\.|\$|\^|\\|\/|\(|\)|\[|\]|\?|\+|\*)/g, function(m) {
                                return "\\" + m;
                            }) + ')?';
                    }
                })
                        .replace(/\s/g, '\\s?') +
                        o.timeSuffix + '$',
                        order = getFormatPositions(f),
                        ampm = '',
                        treg;

                treg = s.match(new RegExp(regstr, 'i'));

                var resTime = {
                    hour: 0,
                    minute: 0,
                    second: 0,
                    millisec: 0
                };

                if (treg) {
                    if (order.t !== -1) {
                        if (treg[order.t] === undefined || treg[order.t].length === 0) {
                            ampm = '';
                            resTime.ampm = '';
                        } else {
                            ampm = $.inArray(treg[order.t].toUpperCase(), o.amNames) !== -1 ? 'AM' : 'PM';
                            resTime.ampm = o[ampm == 'AM' ? 'amNames' : 'pmNames'][0];
                        }
                    }

                    if (order.h !== -1) {
                        if (ampm == 'AM' && treg[order.h] == '12') {
                            resTime.hour = 0; // 12am = 0 hour
                        } else {
                            if (ampm == 'PM' && treg[order.h] != '12') {
                                resTime.hour = parseInt(treg[order.h], 10) + 12; // 12pm = 12 hour, any other pm = hour + 12
                            } else {
                                resTime.hour = Number(treg[order.h]);
                            }
                        }
                    }

                    if (order.m !== -1) {
                        resTime.minute = Number(treg[order.m]);
                    }
                    if (order.s !== -1) {
                        resTime.second = Number(treg[order.s]);
                    }
                    if (order.l !== -1) {
                        resTime.millisec = Number(treg[order.l]);
                    }
                    if (order.z !== -1 && treg[order.z] !== undefined) {
                        var tz = treg[order.z].toUpperCase();
                        switch (tz.length) {
                            case 1:
                                // Z
                                tz = o.timezoneIso8601 ? 'Z' : '+0000';
                                break;
                            case 5:
                                // +hhmm
                                if (o.timezoneIso8601) {
                                    tz = tz.substring(1) == '0000' ? 'Z' : tz.substring(0, 3) + ':' + tz.substring(3);
                                }
                                break;
                            case 6:
                                // +hh:mm
                                if (!o.timezoneIso8601) {
                                    tz = tz == 'Z' || tz.substring(1) == '00:00' ? '+0000' : tz.replace(/:/, '');
                                } else {
                                    if (tz.substring(1) == '00:00') {
                                        tz = 'Z';
                                    }
                                }
                                break;
                        }
                        resTime.timezone = tz;
                    }


                    return resTime;
                }
                return false;
            };// end strictParse

            // First try JS Date, if that fails, use strictParse
            var looseParse = function(f, s, o) {
                try {
                    var d = new Date('2012-01-01 ' + s);
                    if (isNaN(d.getTime())) {
                        d = new Date('2012-01-01T' + s);
                        if (isNaN(d.getTime())) {
                            d = new Date('01/01/2012 ' + s);
                            if (isNaN(d.getTime())) {
                                throw "Unable to parse time with native Date: " + s;
                            }
                        }
                    }

                    return {
                        hour: d.getHours(),
                        minute: d.getMinutes(),
                        second: d.getSeconds(),
                        millisec: d.getMilliseconds(),
                        timezone: $.timepicker.timeZoneOffsetString(d)
                    };
                }
                catch (err) {
                    try {
                        return strictParse(f, s, o);
                    }
                    catch (err2) {
                        $.timepicker.log("Unable to parse \ntimeString: " + s + "\ntimeFormat: " + f);
                    }
                }
                return false;
            }; // end looseParse

            if (typeof o.parse === "function") {
                return o.parse(timeFormat, timeString, o)
            }
            if (o.parse === 'loose') {
                return looseParse(timeFormat, timeString, o);
            }
            return strictParse(timeFormat, timeString, o);
        };

        /*
         * Public utility to format the time
         * format = string format of the time
         * time = a {}, not a Date() for timezones
         * options = essentially the regional[].. amNames, pmNames, ampm
         */
        $.datepicker.formatTime = function(format, time, options) {
            options = options || {};
            options = $.extend({}, $.timepicker._defaults, options);
            time = $.extend({
                hour: 0,
                minute: 0,
                second: 0,
                millisec: 0,
                timezone: '+0000'
            }, time);

            var tmptime = format,
                    ampmName = options.amNames[0],
                    hour = parseInt(time.hour, 10);

            if (hour > 11) {
                ampmName = options.pmNames[0];
            }

            tmptime = tmptime.replace(/(?:HH?|hh?|mm?|ss?|[tT]{1,2}|[lz]|('.*?'|".*?"))/g, function(match) {
                switch (match) {
                    case 'HH':
                        return ('0' + hour).slice(-2);
                    case 'H':
                        return hour;
                    case 'hh':
                        return ('0' + convert24to12(hour)).slice(-2);
                    case 'h':
                        return convert24to12(hour);
                    case 'mm':
                        return ('0' + time.minute).slice(-2);
                    case 'm':
                        return time.minute;
                    case 'ss':
                        return ('0' + time.second).slice(-2);
                    case 's':
                        return time.second;
                    case 'l':
                        return ('00' + time.millisec).slice(-3);
                    case 'z':
                        return time.timezone === null ? options.defaultTimezone : time.timezone;
                    case 'T':
                        return ampmName.charAt(0).toUpperCase();
                    case 'TT':
                        return ampmName.toUpperCase();
                    case 't':
                        return ampmName.charAt(0).toLowerCase();
                    case 'tt':
                        return ampmName.toLowerCase();
                    default:
                        return match.replace(/\'/g, "") || "'";
                }
            });

            tmptime = $.trim(tmptime);
            return tmptime;
        };

        /*
         * the bad hack :/ override datepicker so it doesnt close on select
         // inspired: http://stackoverflow.com/questions/1252512/jquery-datepicker-prevent-closing-picker-when-clicking-a-date/1762378#1762378
         */
        $.datepicker._base_selectDate = $.datepicker._selectDate;
        $.datepicker._selectDate = function(id, dateStr) {
            var inst = this._getInst($(id)[0]),
                    tp_inst = this._get(inst, 'timepicker');

            if (tp_inst) {
                tp_inst._limitMinMaxDateTime(inst, true);
                inst.inline = inst.stay_open = true;
                //This way the onSelect handler called from calendarpicker get the full dateTime
                this._base_selectDate(id, dateStr);
                inst.inline = inst.stay_open = false;
                this._notifyChange(inst);
                this._updateDatepicker(inst);
            } else {
                this._base_selectDate(id, dateStr);
            }
        };

        /*
         * second bad hack :/ override datepicker so it triggers an event when changing the input field
         * and does not redraw the datepicker on every selectDate event
         */
        $.datepicker._base_updateDatepicker = $.datepicker._updateDatepicker;
        $.datepicker._updateDatepicker = function(inst) {

            // don't popup the datepicker if there is another instance already opened
            var input = inst.input[0];
            if ($.datepicker._curInst && $.datepicker._curInst != inst && $.datepicker._datepickerShowing && $.datepicker._lastInput != input) {
                return;
            }

            if (typeof(inst.stay_open) !== 'boolean' || inst.stay_open === false) {

                this._base_updateDatepicker(inst);

                // Reload the time control when changing something in the input text field.
                var tp_inst = this._get(inst, 'timepicker');
                if (tp_inst) {
                    tp_inst._addTimePicker(inst);

//				if (tp_inst._defaults.useLocalTimezone) { //checks daylight saving with the new date.
//					var date = new Date(inst.selectedYear, inst.selectedMonth, inst.selectedDay, 12);
//					selectLocalTimeZone(tp_inst, date);
//					tp_inst._onTimeChange();
//				}
                }
            }
        };

        /*
         * third bad hack :/ override datepicker so it allows spaces and colon in the input field
         */
        $.datepicker._base_doKeyPress = $.datepicker._doKeyPress;
        $.datepicker._doKeyPress = function(event) {
            var inst = $.datepicker._getInst(event.target),
                    tp_inst = $.datepicker._get(inst, 'timepicker');

            if (tp_inst) {
                if ($.datepicker._get(inst, 'constrainInput')) {
                    var ampm = useAmpm(tp_inst._defaults.timeFormat),
                            dateChars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat')),
                            datetimeChars = tp_inst._defaults.timeFormat.toString()
                            .replace(/[hms]/g, '')
                            .replace(/TT/g, ampm ? 'APM' : '')
                            .replace(/Tt/g, ampm ? 'AaPpMm' : '')
                            .replace(/tT/g, ampm ? 'AaPpMm' : '')
                            .replace(/T/g, ampm ? 'AP' : '')
                            .replace(/tt/g, ampm ? 'apm' : '')
                            .replace(/t/g, ampm ? 'ap' : '') +
                            " " + tp_inst._defaults.separator +
                            tp_inst._defaults.timeSuffix +
                            (tp_inst._defaults.showTimezone ? tp_inst._defaults.timezoneList.join('') : '') +
                            (tp_inst._defaults.amNames.join('')) + (tp_inst._defaults.pmNames.join('')) +
                            dateChars,
                            chr = String.fromCharCode(event.charCode === undefined ? event.keyCode : event.charCode);
                    return event.ctrlKey || (chr < ' ' || !dateChars || datetimeChars.indexOf(chr) > -1);
                }
            }

            return $.datepicker._base_doKeyPress(event);
        };

        /*
         * Fourth bad hack :/ override _updateAlternate function used in inline mode to init altField
         */
        $.datepicker._base_updateAlternate = $.datepicker._updateAlternate;
        /* Update any alternate field to synchronise with the main field. */
        $.datepicker._updateAlternate = function(inst) {
            var tp_inst = this._get(inst, 'timepicker');
            if (tp_inst) {
                var altField = tp_inst._defaults.altField;
                if (altField) { // update alternate field too
                    var altFormat = tp_inst._defaults.altFormat || tp_inst._defaults.dateFormat,
                            date = this._getDate(inst),
                            formatCfg = $.datepicker._getFormatConfig(inst),
                            altFormattedDateTime = '',
                            altSeparator = tp_inst._defaults.altSeparator ? tp_inst._defaults.altSeparator : tp_inst._defaults.separator,
                            altTimeSuffix = tp_inst._defaults.altTimeSuffix ? tp_inst._defaults.altTimeSuffix : tp_inst._defaults.timeSuffix,
                            altTimeFormat = tp_inst._defaults.altTimeFormat !== null ? tp_inst._defaults.altTimeFormat : tp_inst._defaults.timeFormat;

                    altFormattedDateTime += $.datepicker.formatTime(altTimeFormat, tp_inst, tp_inst._defaults) + altTimeSuffix;
                    if (!tp_inst._defaults.timeOnly && !tp_inst._defaults.altFieldTimeOnly && date !== null) {
                        if (tp_inst._defaults.altFormat)
                            altFormattedDateTime = $.datepicker.formatDate(tp_inst._defaults.altFormat, date, formatCfg) + altSeparator + altFormattedDateTime;
                        else
                            altFormattedDateTime = tp_inst.formattedDate + altSeparator + altFormattedDateTime;
                    }
                    $(altField).val(altFormattedDateTime);
                }
            }
            else {
                $.datepicker._base_updateAlternate(inst);
            }
        };

        /*
         * Override key up event to sync manual input changes.
         */
        $.datepicker._base_doKeyUp = $.datepicker._doKeyUp;
        $.datepicker._doKeyUp = function(event) {
            var inst = $.datepicker._getInst(event.target),
                    tp_inst = $.datepicker._get(inst, 'timepicker');

            if (tp_inst) {
                if (tp_inst._defaults.timeOnly && (inst.input.val() != inst.lastVal)) {
                    try {
                        $.datepicker._updateDatepicker(inst);
                    } catch (err) {
                        $.timepicker.log(err);
                    }
                }
            }

            return $.datepicker._base_doKeyUp(event);
        };

        /*
         * override "Today" button to also grab the time.
         */
        $.datepicker._base_gotoToday = $.datepicker._gotoToday;
        $.datepicker._gotoToday = function(id) {
            var inst = this._getInst($(id)[0]),
                    $dp = inst.dpDiv;
            this._base_gotoToday(id);
            var tp_inst = this._get(inst, 'timepicker');
            selectLocalTimeZone(tp_inst);
            var now = new Date();
            this._setTime(inst, now);
            $('.ui-datepicker-today', $dp).click();
        };

        /*
         * Disable & enable the Time in the datetimepicker
         */
        $.datepicker._disableTimepickerDatepicker = function(target) {
            var inst = this._getInst(target);
            if (!inst) {
                return;
            }

            var tp_inst = this._get(inst, 'timepicker');
            $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
            if (tp_inst) {
                tp_inst._defaults.showTimepicker = false;
                tp_inst._updateDateTime(inst);
            }
        };

        $.datepicker._enableTimepickerDatepicker = function(target) {
            var inst = this._getInst(target);
            if (!inst) {
                return;
            }

            var tp_inst = this._get(inst, 'timepicker');
            $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
            if (tp_inst) {
                tp_inst._defaults.showTimepicker = true;
                tp_inst._addTimePicker(inst); // Could be disabled on page load
                tp_inst._updateDateTime(inst);
            }
        };

        /*
         * Create our own set time function
         */
        $.datepicker._setTime = function(inst, date) {
            var tp_inst = this._get(inst, 'timepicker');
            if (tp_inst) {
                var defaults = tp_inst._defaults;

                // calling _setTime with no date sets time to defaults
                tp_inst.hour = date ? date.getHours() : defaults.hour;
                tp_inst.minute = date ? date.getMinutes() : defaults.minute;
                tp_inst.second = date ? date.getSeconds() : defaults.second;
                tp_inst.millisec = date ? date.getMilliseconds() : defaults.millisec;

                //check if within min/max times.. 
                tp_inst._limitMinMaxDateTime(inst, true);

                tp_inst._onTimeChange();
                tp_inst._updateDateTime(inst);
            }
        };

        /*
         * Create new public method to set only time, callable as $().datepicker('setTime', date)
         */
        $.datepicker._setTimeDatepicker = function(target, date, withDate) {
            var inst = this._getInst(target);
            if (!inst) {
                return;
            }

            var tp_inst = this._get(inst, 'timepicker');

            if (tp_inst) {
                this._setDateFromField(inst);
                var tp_date;
                if (date) {
                    if (typeof date == "string") {
                        tp_inst._parseTime(date, withDate);
                        tp_date = new Date();
                        tp_date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second, tp_inst.millisec);
                    } else {
                        tp_date = new Date(date.getTime());
                    }
                    if (tp_date.toString() == 'Invalid Date') {
                        tp_date = undefined;
                    }
                    this._setTime(inst, tp_date);
                }
            }

        };

        /*
         * override setDate() to allow setting time too within Date object
         */
        $.datepicker._base_setDateDatepicker = $.datepicker._setDateDatepicker;
        $.datepicker._setDateDatepicker = function(target, date) {
            var inst = this._getInst(target);
            if (!inst) {
                return;
            }

            var tp_date = (date instanceof Date) ? new Date(date.getTime()) : date;

            this._updateDatepicker(inst);
            this._base_setDateDatepicker.apply(this, arguments);
            this._setTimeDatepicker(target, tp_date, true);
        };

        /*
         * override getDate() to allow getting time too within Date object
         */
        $.datepicker._base_getDateDatepicker = $.datepicker._getDateDatepicker;
        $.datepicker._getDateDatepicker = function(target, noDefault) {
            var inst = this._getInst(target);
            if (!inst) {
                return;
            }

            var tp_inst = this._get(inst, 'timepicker');

            if (tp_inst) {
                // if it hasn't yet been defined, grab from field
                if (inst.lastVal === undefined) {
                    this._setDateFromField(inst, noDefault);
                }

                var date = this._getDate(inst);
                if (date && tp_inst._parseTime($(target).val(), tp_inst.timeOnly)) {
                    date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second, tp_inst.millisec);
                }
                return date;
            }
            return this._base_getDateDatepicker(target, noDefault);
        };

        /*
         * override parseDate() because UI 1.8.14 throws an error about "Extra characters"
         * An option in datapicker to ignore extra format characters would be nicer.
         */
        $.datepicker._base_parseDate = $.datepicker.parseDate;
        $.datepicker.parseDate = function(format, value, settings) {
            var date;
            try {
                date = this._base_parseDate(format, value, settings);
            } catch (err) {
                // Hack!  The error message ends with a colon, a space, and
                // the "extra" characters.  We rely on that instead of
                // attempting to perfectly reproduce the parsing algorithm.
                date = this._base_parseDate(format, value.substring(0, value.length - (err.length - err.indexOf(':') - 2)), settings);
                $.timepicker.log("Error parsing the date string: " + err + "\ndate string = " + value + "\ndate format = " + format);
            }
            return date;
        };

        /*
         * override formatDate to set date with time to the input
         */
        $.datepicker._base_formatDate = $.datepicker._formatDate;
        $.datepicker._formatDate = function(inst, day, month, year) {
            var tp_inst = this._get(inst, 'timepicker');
            if (tp_inst) {
                tp_inst._updateDateTime(inst);
                return tp_inst.$input.val();
            }
            return this._base_formatDate(inst);
        };

        /*
         * override options setter to add time to maxDate(Time) and minDate(Time). MaxDate
         */
        $.datepicker._base_optionDatepicker = $.datepicker._optionDatepicker;
        $.datepicker._optionDatepicker = function(target, name, value) {
            var inst = this._getInst(target),
                    name_clone;
            if (!inst) {
                return null;
            }

            var tp_inst = this._get(inst, 'timepicker');
            if (tp_inst) {
                var min = null,
                        max = null,
                        onselect = null,
                        overrides = tp_inst._defaults.evnts,
                        fns = {},
                        prop;
                if (typeof name == 'string') { // if min/max was set with the string
                    if (name === 'minDate' || name === 'minDateTime') {
                        min = value;
                    } else if (name === 'maxDate' || name === 'maxDateTime') {
                        max = value;
                    } else if (name === 'onSelect') {
                        onselect = value;
                    } else if (overrides.hasOwnProperty(name)) {
                        if (typeof (value) === 'undefined') {
                            return overrides[name];
                        }
                        fns[name] = value;
                        name_clone = {}; //empty results in exiting function after overrides updated
                    }
                } else if (typeof name == 'object') { //if min/max was set with the JSON
                    if (name.minDate) {
                        min = name.minDate;
                    } else if (name.minDateTime) {
                        min = name.minDateTime;
                    } else if (name.maxDate) {
                        max = name.maxDate;
                    } else if (name.maxDateTime) {
                        max = name.maxDateTime;
                    }
                    for (prop in overrides) {
                        if (overrides.hasOwnProperty(prop) && name[prop]) {
                            fns[prop] = name[prop];
                        }
                    }
                }
                for (prop in fns) {
                    if (fns.hasOwnProperty(prop)) {
                        overrides[prop] = fns[prop];
                        if (!name_clone) {
                            name_clone = $.extend({}, name);
                        }
                        delete name_clone[prop];
                    }
                }
                if (name_clone && isEmptyObject(name_clone)) {
                    return;
                }
                if (min) { //if min was set
                    if (min === 0) {
                        min = new Date();
                    } else {
                        min = new Date(min);
                    }
                    tp_inst._defaults.minDate = min;
                    tp_inst._defaults.minDateTime = min;
                } else if (max) { //if max was set
                    if (max === 0) {
                        max = new Date();
                    } else {
                        max = new Date(max);
                    }
                    tp_inst._defaults.maxDate = max;
                    tp_inst._defaults.maxDateTime = max;
                } else if (onselect) {
                    tp_inst._defaults.onSelect = onselect;
                }
            }
            if (value === undefined) {
                return this._base_optionDatepicker.call($.datepicker, target, name);
            }
            return this._base_optionDatepicker.call($.datepicker, target, name_clone || name, value);
        };
        /*
         * jQuery isEmptyObject does not check hasOwnProperty - if someone has added to the object prototype,
         * it will return false for all objects
         */
        var isEmptyObject = function(obj) {
            var prop;
            for (prop in obj) {
                if (obj.hasOwnProperty(obj)) {
                    return false;
                }
            }
            return true;
        };

        /*
         * jQuery extend now ignores nulls!
         */
        var extendRemove = function(target, props) {
            $.extend(target, props);
            for (var name in props) {
                if (props[name] === null || props[name] === undefined) {
                    target[name] = props[name];
                }
            }
            return target;
        };

        /*
         * Determine by the time format if should use ampm
         * Returns true if should use ampm, false if not
         */
        var useAmpm = function(timeFormat) {
            return (timeFormat.indexOf('t') !== -1 && timeFormat.indexOf('h') !== -1);
        };

        /*
         * Converts 24 hour format into 12 hour
         * Returns 12 hour without leading 0
         */
        var convert24to12 = function(hour) {
            if (hour > 12) {
                hour = hour - 12;
            }

            if (hour == 0) {
                hour = 12;
            }

            return String(hour);
        };

        /*
         * Splits datetime string into date ans time substrings.
         * Throws exception when date can't be parsed
         * Returns [dateString, timeString]
         */
        var splitDateTime = function(dateFormat, dateTimeString, dateSettings, timeSettings) {
            try {
                // The idea is to get the number separator occurances in datetime and the time format requested (since time has 
                // fewer unknowns, mostly numbers and am/pm). We will use the time pattern to split.
                var separator = timeSettings && timeSettings.separator ? timeSettings.separator : $.timepicker._defaults.separator,
                        format = timeSettings && timeSettings.timeFormat ? timeSettings.timeFormat : $.timepicker._defaults.timeFormat,
                        timeParts = format.split(separator), // how many occurances of separator may be in our format?
                        timePartsLen = timeParts.length,
                        allParts = dateTimeString.split(separator),
                        allPartsLen = allParts.length;

                if (allPartsLen > 1) {
                    return [
                        allParts.splice(0, allPartsLen - timePartsLen).join(separator),
                        allParts.splice(0, timePartsLen).join(separator)
                    ];
                }

            } catch (err) {
                $.timepicker.log('Could not split the date from the time. Please check the following datetimepicker options' +
                        "\nthrown error: " + err +
                        "\ndateTimeString" + dateTimeString +
                        "\ndateFormat = " + dateFormat +
                        "\nseparator = " + timeSettings.separator +
                        "\ntimeFormat = " + timeSettings.timeFormat);

                if (err.indexOf(":") >= 0) {
                    // Hack!  The error message ends with a colon, a space, and
                    // the "extra" characters.  We rely on that instead of
                    // attempting to perfectly reproduce the parsing algorithm.
                    var dateStringLength = dateTimeString.length - (err.length - err.indexOf(':') - 2),
                            timeString = dateTimeString.substring(dateStringLength);

                    return [$.trim(dateTimeString.substring(0, dateStringLength)), $.trim(dateTimeString.substring(dateStringLength))];

                } else {
                    throw err;
                }
            }
            return [dateTimeString, ''];
        };

        /*
         * Internal function to parse datetime interval
         * Returns: {date: Date, timeObj: Object}, where
         *   date - parsed date without time (type Date)
         *   timeObj = {hour: , minute: , second: , millisec: } - parsed time. Optional
         */
        var parseDateTimeInternal = function(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings) {
            var date;
            var splitRes = splitDateTime(dateFormat, dateTimeString, dateSettings, timeSettings);
            date = $.datepicker._base_parseDate(dateFormat, splitRes[0], dateSettings);
            if (splitRes[1] !== '') {
                var timeString = splitRes[1],
                        parsedTime = $.datepicker.parseTime(timeFormat, timeString, timeSettings);

                if (parsedTime === null) {
                    throw 'Wrong time format';
                }
                return {
                    date: date,
                    timeObj: parsedTime
                };
            } else {
                return {
                    date: date
                };
            }
        };

        /*
         * Internal function to set timezone_select to the local timezone
         */
        var selectLocalTimeZone = function(tp_inst, date) {
            if (tp_inst && tp_inst.timezone_select) {
                tp_inst._defaults.useLocalTimezone = true;
                var now = typeof date !== 'undefined' ? date : new Date();
                var tzoffset = $.timepicker.timeZoneOffsetString(now);
                if (tp_inst._defaults.timezoneIso8601) {
                    tzoffset = tzoffset.substring(0, 3) + ':' + tzoffset.substring(3);
                }
                tp_inst.timezone_select.val(tzoffset);
            }
        };

        /*
         * Create a Singleton Insance
         */
        $.timepicker = new Timepicker();

        /**
         * Get the timezone offset as string from a date object (eg '+0530' for UTC+5.5)
         * @param  date
         * @return string
         */
        $.timepicker.timeZoneOffsetString = function(date) {
            var off = date.getTimezoneOffset() * -1,
                    minutes = off % 60,
                    hours = (off - minutes) / 60;
            return (off >= 0 ? '+' : '-') + ('0' + (hours * 101).toString()).slice(-2) + ('0' + (minutes * 101).toString()).slice(-2);
        };

        /**
         * Calls `timepicker()` on the `startTime` and `endTime` elements, and configures them to
         * enforce date range limits.
         * n.b. The input value must be correctly formatted (reformatting is not supported)
         * @param  Element startTime
         * @param  Element endTime
         * @param  obj options Options for the timepicker() call
         * @return jQuery
         */
        $.timepicker.timeRange = function(startTime, endTime, options) {
            return $.timepicker.handleRange('timepicker', startTime, endTime, options);
        };

        /**
         * Calls `datetimepicker` on the `startTime` and `endTime` elements, and configures them to
         * enforce date range limits.
         * @param  Element startTime
         * @param  Element endTime
         * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
         *   a boolean value that can be used to reformat the input values to the `dateFormat`.
         * @param  string method Can be used to specify the type of picker to be added
         * @return jQuery
         */
        $.timepicker.dateTimeRange = function(startTime, endTime, options) {
            $.timepicker.dateRange(startTime, endTime, options, 'datetimepicker');
        };

        /**
         * Calls `method` on the `startTime` and `endTime` elements, and configures them to
         * enforce date range limits.
         * @param  Element startTime
         * @param  Element endTime
         * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
         *   a boolean value that can be used to reformat the input values to the `dateFormat`.
         * @param  string method Can be used to specify the type of picker to be added
         * @return jQuery
         */
        $.timepicker.dateRange = function(startTime, endTime, options, method) {
            method = method || 'datepicker';
            $.timepicker.handleRange(method, startTime, endTime, options);
        };

        /**
         * Calls `method` on the `startTime` and `endTime` elements, and configures them to
         * enforce date range limits.
         * @param  string method Can be used to specify the type of picker to be added
         * @param  Element startTime
         * @param  Element endTime
         * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
         *   a boolean value that can be used to reformat the input values to the `dateFormat`.
         * @return jQuery
         */
        $.timepicker.handleRange = function(method, startTime, endTime, options) {
            $.fn[method].call(startTime, $.extend({
                onClose: function(dateText, inst) {
                    checkDates(this, endTime, dateText);
                },
                onSelect: function(selectedDateTime) {
                    selected(this, endTime, 'minDate');
                }
            }, options, options.start));
            $.fn[method].call(endTime, $.extend({
                onClose: function(dateText, inst) {
                    checkDates(this, startTime, dateText);
                },
                onSelect: function(selectedDateTime) {
                    selected(this, startTime, 'maxDate');
                }
            }, options, options.end));
            // timepicker doesn't provide access to its 'timeFormat' option, 
            // nor could I get datepicker.formatTime() to behave with times, so I
            // have disabled reformatting for timepicker
            if (method != 'timepicker' && options.reformat) {
                $([startTime, endTime]).each(function() {
                    var format = $(this)[method].call($(this), 'option', 'dateFormat'),
                            date = new Date($(this).val());
                    if ($(this).val() && date) {
                        $(this).val($.datepicker.formatDate(format, date));
                    }
                });
            }
            checkDates(startTime, endTime, startTime.val());

            function checkDates(changed, other, dateText) {
                if (other.val() && (new Date(startTime.val()) > new Date(endTime.val()))) {
                    other.val(dateText);
                }
            }
            selected(startTime, endTime, 'minDate');
            selected(endTime, startTime, 'maxDate');

            function selected(changed, other, option) {
                if (!$(changed).val()) {
                    return;
                }
                var date = $(changed)[method].call($(changed), 'getDate');
                // timepicker doesn't implement 'getDate' and returns a jQuery
                if (date.getTime) {
                    $(other)[method].call($(other), 'option', option, date);
                }
            }
            return $([startTime.get(0), endTime.get(0)]);
        };

        /**
         * Log error or data to the console during error or debugging
         * @param  Object err pass any type object to log to the console during error or debugging
         * @return void
         */
        $.timepicker.log = function(err) {
            if (window.console)
                console.log(err);
        };

        /*
         * Keep up with the version
         */
        $.timepicker.version = "1.2";

    })(jQuery);
});